We will study the effects of entrainment by unilateral or bilateral, synchronous or asynchronous TMS pulses on behavior. The goal of the study is to determine if entrainment by TMS will affect task performance. If the results show that TMS by entrainment influenced behavior, then we can expect TMS to be a useful technique to explore the behavioral impact of specific neuronal oscillations under physiological as well as pathological conditions. Further, TMS could also find applications in rehabilitation or treatment of behavioral symptoms in patients with neuropsychiatric diseases.